PF: Both the blinds are very tight so I decide to raise K5o for the fold equity, both pre-flop and post-flop. Should I stick to suited Ks or is this OK against TAGs?

F: Villain donks which usually indicates weakness, he likely has a pair or some sort or a draw as is trying to take the pot down. If he has better then he'd probably opt for a check/raise on this type of board.

I could call and see what he does on turn but to avoid tricky situations it's probably best to try and take the pot down with a raise?

We at the best could be playing here way ahead/behind and reevaluate the turn. Raising might be too much over-valuing our hand. Especially if he is tight there ain't that many worse hands which he calls.